Yeah, I've only ever seen it used as an admonishment against someone. Like, someone says something rude as fuck and they get told "don't yuck someone else's yum" ... which, isn't terrible, when it's advice being given to people acting like children.
Saying "I don't want to yuck your yum, but, the thing you like is blah-blah-blah" could easily be changed to "I'm an asshole and I think the things you like are blah-blah-blah" and the context of what was being said wouldn't change.